Carbon nanotube nanoelectronics and macroelectronics

Nanotube electronics still faces significant challenges such as integration/assembly, co-existence of metallic and semiconducting nanotubes, and air-stable n-type nanotube transistor for complementary circuit operation. Here we report our solutions to these major obstacles, which may eventually lead to realistic and scalable nanotube integrated circuits. We report the wafer-scale synthesis, transfer of horizontally aligned high-density nanotubes and the application of the high performance aligned nanotube transistors in CMOS integrated circuits. To solve the problem of coexistence of metallic and semiconducting nanotubes, we report a scalable method of fabricating thin-film transistors using pre-separated, semiconducting enriched nanotubes, and have further looked into their application in display electronics. The techniques reported here could serve as critical foundation for future nanotube-based integrated circuits and display electronics.